Low temperature removal using catalytic reforming of harmful gases generated in CFRP thermal decomposition

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K20484
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 64030:Environmental materials and recycle technology-related
• Research Institution: Kyushu University (2020-2021); Seikei University (2019)
• Principal Investigator: Oshima Kaumasa 九州大学, 工学研究院, 助教 (60734275)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 炭素繊維強化プラスチック / 有害物除去 / 熱分解リサイクル / フェノール水蒸気改質 / ペロブスカイト型酸化物

Outline of Final Research Achievements

In this study, we investigated the removal of harmful gases including aromatics generated from thermal decomposition of carbon fiber reinforced plastic (CFRP) and the recovery of valuable product in order to promote the CFRP recycling. We found that BEA-type zeolite was effective for the conversion of heavy hydrocarbons generated in the CFRP thermal decomposition, and that the zeolite can selectively convert to phenol which is a valuable product. In addition, we found that the temperature of phenol steam reforming could be lowered by adding an alkaline earth metal to a Ni catalyst. Furthermore, as an effective method of reusing carbon fibers collected in the thermal decomposition, we achieved the synthesis of perovskite having a hollow-form, which could utilize for PM combustion catalyst using carbon fibers as a template.

Free Research Field

反応工学

Academic Significance and Societal Importance of the Research Achievements

近年需要が増大しているCFRPのリサイクルの課題である熱分解中の有害ガスの除去について、熱分解排熱を活用した触媒的除去プロセスを提案できた。車体軽量化による燃費向上を背景としてCFRP需要は年々増加しており、リサイクルにおける課題の解決方策の提案は、社会的に意義のある成果であったと考える。また使用済み炭素繊維を活用した中空状材料の合成では、その形状を活かした様々な用途が考えられ、学術的にも貢献できたと考えている。